The US government is reportedly investigating technology to block sunlight as an "important insurance" against climate change fueled by rising emissions and is asking world scientists to develop the technology.

Options being considered include giant space mirrors and pumping reflective dust into the atmosphere. According to scientists reflecting 1% of sunlight could cancel out all greenhouse emissions since the industrial revolution.

The US government, while accepting that the planet will increase in temperature by up to 5.8 degrees this century with a 90% probability that humans are to blame, is pushing for voluntary instead of binding agreements on emission reduction.

Well, this idea is a mirror image of one of the highlander movies; they created a shield to block out the sun and send us into a never ending night due to pollution, and conner (who helped make it) tries to destroy it...

The Russians had thought about doing this during the cold war and the American states were strongly against it. Just because the Russians were going to use it as part of their war machine doesn't mean the States won't try. The Russians liked the idea of lighting up a night battlefield or darkening one, as well as melting ice caps to create floods in valleys below and starting mass bush fires and increase UV rays, etc. I don't approve the idea because its side stepping the underlining problem of CO2 emissions. Why not lower those instead of trying to put a giant foil wrap in space.